﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Data.SqlClient;
using System.Data.OleDb;
using System.Data;
//using System.Windows.Forms;
using System.Text.RegularExpressions;
using System.IO;

using System.Collections;
using System.Collections.Specialized;
using System.Configuration;
using System.Data.Common;

namespace DBUtility
{

    /// <summary>
    /// 数据访问抽象基础类
    /// </summary>
    public abstract class DbHelperSQL
    {
        //////数据库连接字符串(web.config来配置)，多数据库可使用DbHelperSQLP来实现.
        public static readonly string connectionString = ConfigurationManager.ConnectionStrings["Constr"].ConnectionString.ToString();
        //public static readonly string connectionString = "Server=121.42.198.248;Database=BaiBan1;uid=xiaoma123;pwd=XIAOma123;Integrated Security=false;  pooling=true; Min Pool Size=500;Max Pool Size=1024;";

        #region 构造
        /// <summary>
        /// 构造函数
        /// </summary>
        public DbHelperSQL()
        {
            if (string.IsNullOrEmpty(connectionString))
                ConfigurationManager.ConnectionStrings["newLifeConstr"].ConnectionString.ToString();
        }
        #endregion

        #region 公用方法
        /// <summary>
        /// 判断是否存在某表的某个字段
        /// </summary>
        /// <param name="tableName">表名称</param>
        /// <param name="columnName">列名称</param>
        /// <returns>是否存在</returns>
        public static bool ColumnExists(string tableName, string columnName)
        {
            string sql = "select count(1) from syscolumns where [id]=object_id('" + tableName + "') and [name]='" + columnName + "'";
            object res = GetSingle(sql);
            if (res == null)
            {
                return false;
            }
            return Convert.ToInt32(res) > 0;
        }
        public static int GetMaxID(string FieldName, string TableName)
        {
            string strsql = "select max(" + FieldName + ")+1 from " + TableName;
            object obj = GetSingle(strsql);
            if (obj == null)
            {
                return 1;
            }
            else
            {
                return int.Parse(obj.ToString());
            }
        }
        public static int GetMaxID(string FieldName, string TableName, string whereStr)
        {
            string strsql = "select max(" + FieldName + ") from " + TableName + " where " + whereStr;
            object obj = GetSingle(strsql);
            if (obj == null)
            {
                return 1;
            }
            else
            {
                return int.Parse(obj.ToString());
            }
        }
        public static bool Exists(string strSql)
        {
            object obj = GetSingle(strSql);
            int cmdresult;
            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
            {
                cmdresult = 0;
            }
            else
            {
                cmdresult = int.Parse(obj.ToString()); //也可能=0
            }
            if (cmdresult == 0)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
        /// <summary>
        /// 表是否存在
        /// </summary>
        /// <param name="TableName"></param>
        /// <returns></returns>
        public static bool TabExists(string TableName)
        {
            string strsql = "select count(*) from sysobjects where id = object_id(N'[" + TableName + "]') and OBJECTPROPERTY(id, N'IsUserTable') = 1";
            //string strsql = "SELECT count(*) FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[" + TableName + "]') AND type in (N'U')";
            object obj = GetSingle(strsql);
            int cmdresult;
            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
            {
                cmdresult = 0;
            }
            else
            {
                cmdresult = int.Parse(obj.ToString());
            }
            if (cmdresult == 0)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
        public static bool Exists(string strSql, params SqlParameter[] cmdParms)
        {
            object obj = GetSingle(strSql, cmdParms);
            int cmdresult;
            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
            {
                cmdresult = 0;
            }
            else
            {
                cmdresult = int.Parse(obj.ToString());
            }
            if (cmdresult == 0)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
        #endregion

        #region  执行简单SQL语句

        /// <summary>
        /// 执行SQL语句，返回影响的记录数
        /// </summary>
        /// <param name="SQLString">SQL语句</param>
        /// <returns>影响的记录数</returns>
        public static int ExecuteSql(string SQLString)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(SQLString, connection))
                {
                    try
                    {
                        connection.Open();
                        int rows = cmd.ExecuteNonQuery();

                        cmd.Dispose();
                        connection.Close();
                        return rows;
                    }
                    catch (System.Data.SqlClient.SqlException e)
                    {
                        cmd.Dispose();
                        connection.Close();
                        throw e;
                    }
                    finally
                    {
                        cmd.Dispose();
                        connection.Close();
                    }
                }
            }
        }

        public static int ExecuteSqlByTime(string SQLString, int Times)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(SQLString, connection))
                {
                    try
                    {
                        connection.Open();
                        cmd.CommandTimeout = Times;
                        int rows = cmd.ExecuteNonQuery();
                        return rows;
                    }
                    catch (System.Data.SqlClient.SqlException e)
                    {
                        throw e;
                    }
                    finally
                    {
                        cmd.Dispose();
                        connection.Close();
                    }
                }
            }
        }

        /// <summary>
        /// 执行多条SQL语句，实现数据库事务。
        /// </summary>
        /// <param name="SQLStringList">多条SQL语句</param>		
        public static int ExecuteSqlTran(List<String> SQLStringList)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                conn.Open();
                SqlCommand cmd = new SqlCommand();
                cmd.Connection = conn;
                SqlTransaction tx = conn.BeginTransaction();
                cmd.Transaction = tx;
                try
                {
                    int count = 0;
                    for (int n = 0; n < SQLStringList.Count; n++)
                    {
                        string strsql = SQLStringList[n];
                        if (strsql.Trim().Length > 1)
                        {
                            cmd.CommandText = strsql;
                            count += cmd.ExecuteNonQuery();
                        }
                    }
                    tx.Commit();
                    return count;
                }
                catch
                {
                    tx.Rollback();
                    return 0;
                }
                finally
                {
                    cmd.Dispose();
                    conn.Close();
                }
            }
        }

        /// <summary>
        /// 执行带一个存储过程参数的的SQL语句。
        /// </summary>
        /// <param name="SQLString">SQL语句</param>
        /// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
        /// <returns>影响的记录数</returns>
        public static int ExecuteSql(string SQLString, string content)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                SqlCommand cmd = new SqlCommand(SQLString, connection);
                System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@content", SqlDbType.NText);
                myParameter.Value = content;
                cmd.Parameters.Add(myParameter);
                try
                {
                    connection.Open();
                    int rows = cmd.ExecuteNonQuery();
                    return rows;
                }
                catch (System.Data.SqlClient.SqlException e)
                {
                    throw e;
                }
                finally
                {
                    cmd.Dispose();
                    connection.Close();
                }
            }
        }

        /// <summary>
        /// 执行带一个存储过程参数的的SQL语句。
        /// </summary>
        /// <param name="SQLString">SQL语句</param>
        /// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
        /// <returns>影响的记录数</returns>
        public static object ExecuteSqlGet(string SQLString, string content)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                SqlCommand cmd = new SqlCommand(SQLString, connection);
                System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@content", SqlDbType.NText);
                myParameter.Value = content;
                cmd.Parameters.Add(myParameter);
                try
                {
                    connection.Open();
                    object obj = cmd.ExecuteScalar();
                    if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
                    {
                        return null;
                    }
                    else
                    {
                        return obj;
                    }
                }
                catch (System.Data.SqlClient.SqlException e)
                {
                    throw e;
                }
                finally
                {
                    cmd.Dispose();
                    connection.Close();
                }
            }
        }
        /// <summary>
        /// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
        /// </summary>
        /// <param name="strSQL">SQL语句</param>
        /// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
        /// <returns>影响的记录数</returns>
        public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                SqlCommand cmd = new SqlCommand(strSQL, connection);
                try
                {
                    System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter("@fs", SqlDbType.Image);
                    myParameter.Value = fs;
                    cmd.Parameters.Add(myParameter);
                    connection.Open();
                    int rows = cmd.ExecuteNonQuery();
                    return rows;
                }
                catch (System.Data.SqlClient.SqlException e)
                {
                    throw e;
                }
                finally
                {
                    cmd.Dispose();
                    connection.Close();
                }
            }
        }

        /// <summary>
        /// 执行一条计算查询结果语句，返回查询结果（object）。
        /// </summary>
        /// <param name="SQLString">计算查询结果语句</param>
        /// <returns>查询结果（object）</returns>
        public static object GetSingle(string SQLString)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(SQLString, connection))
                {
                    try
                    {
                        connection.Open();
                        object obj = cmd.ExecuteScalar();
                        if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
                        {
                            cmd.Dispose();
                            connection.Close();
                            return null;
                        }
                        else
                        {
                            cmd.Dispose();
                            connection.Close();
                            return obj;
                        }
                    }
                    catch (System.Data.SqlClient.SqlException e)
                    {
                        cmd.Dispose();
                        connection.Close();
                        throw e;
                    }
                    finally
                    {
                        cmd.Dispose();
                        connection.Close();
                    }
                }
            }
        }
        public static object GetSingle(string SQLString, int Times)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(SQLString, connection))
                {
                    try
                    {
                        connection.Open();
                        cmd.CommandTimeout = Times;
                        object obj = cmd.ExecuteScalar();
                        if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
                        {
                            cmd.Dispose();
                            connection.Close();
                            return null;
                        }
                        else
                        {
                            cmd.Dispose();
                            connection.Close();
                            return obj;
                        }
                    }
                    catch (System.Data.SqlClient.SqlException e)
                    {
                        cmd.Dispose();
                        connection.Close();
                        throw e;
                    }
                    finally
                    {
                        cmd.Dispose();
                        connection.Close();
                    }
                }
            }
        }
        /// <summary>
        /// 执行查询语句，返回SqlDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
        /// </summary>
        /// <param name="strSQL">查询语句</param>
        /// <returns>SqlDataReader</returns>
        public static SqlDataReader ExecuteReader(string strSQL)
        {
            SqlConnection connection = new SqlConnection(connectionString);
            SqlCommand cmd = new SqlCommand(strSQL, connection);
            try
            {
                connection.Open();
                SqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                return myReader;
            }
            catch (System.Data.SqlClient.SqlException e)
            {
                throw e;
            }
            finally
            {
                cmd.Dispose();
                connection.Close();
            }

        }
        /// <summary>
        /// 执行查询语句，返回DataSet
        /// </summary>
        /// <param name="SQLString">查询语句</param>
        /// <returns>DataSet</returns>
        public static DataSet Query(string SQLString)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                DataSet ds = new DataSet();
                try
                {
                    connection.Open();
                    using (SqlDataAdapter command = new SqlDataAdapter(SQLString, connection))
                    {
                        command.Fill(ds, "ds");
                        command.Dispose();
                        connection.Close();
                    }
                }
                catch (System.Data.SqlClient.SqlException ex)
                {
                    connection.Close();
                    throw new Exception(ex.Message);
                }
                finally
                {
                    connection.Close();
                }
                return ds;
            }
        }



        #endregion

        #region 执行带参数的SQL语句

        /// <summary>
        /// 执行SQL语句，返回影响的记录数
        /// </summary>
        /// <param name="SQLString">SQL语句</param>
        /// <returns>影响的记录数</returns>
        public static int ExecuteSql(string SQLString, params SqlParameter[] cmdParms)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand())
                {
                    try
                    {
                        PrepareCommand(cmd, connection, null, SQLString, cmdParms);
                        int rows = cmd.ExecuteNonQuery();
                        cmd.Parameters.Clear();

                        cmd.Dispose();
                        connection.Close();
                        return rows;
                    }
                    catch (System.Data.SqlClient.SqlException e)
                    {
                        cmd.Dispose();
                        connection.Close();
                        throw e;
                    }
                    finally
                    {
                        cmd.Dispose();
                        connection.Close();
                    }
                }
            }
        }

        /// <summary>
        /// 执行SQL语句，返回影响的记录数
        /// </summary>
        /// <param name="SQLString">SQL语句</param>
        /// <returns>影响的记录数</returns>
        public static string ExecuteSqlReturnFirstCell(string SQLString, params SqlParameter[] cmdParms)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand())
                {
                    try
                    {
                        PrepareCommand(cmd, connection, null, SQLString, cmdParms);
                        string rows = cmd.ExecuteScalar().ToString();
                        cmd.Parameters.Clear();
                        return rows;
                    }
                    catch (System.Data.SqlClient.SqlException e)
                    {
                        throw e;
                    }
                    finally
                    {
                        cmd.Dispose();
                        connection.Close();
                    }
                }
            }
        }

        /// <summary>
        /// 执行多条SQL语句，实现数据库事务。
        /// </summary>
        /// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的SqlParameter[]）</param>
        public static void ExecuteSqlTran(Hashtable SQLStringList)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                conn.Open();
                using (SqlTransaction trans = conn.BeginTransaction())
                {
                    SqlCommand cmd = new SqlCommand();
                    try
                    {
                        //循环
                        foreach (DictionaryEntry myDE in SQLStringList)
                        {
                            string cmdText = myDE.Key.ToString();
                            SqlParameter[] cmdParms = (SqlParameter[])myDE.Value;
                            PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
                            int val = cmd.ExecuteNonQuery();
                            cmd.Parameters.Clear();
                        }
                        trans.Commit();
                    }
                    catch
                    {
                        trans.Rollback();
                        throw;
                    }
                    finally
                    {
                        trans.Dispose();
                        cmd.Dispose();
                        conn.Close();
                    }
                }
            }
        }

        /// <summary>
        /// 执行多条SQL语句，实现数据库事务。
        /// </summary>
        /// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的SqlParameter[]）</param>
        public static int ExecuteSqlTran(System.Collections.Generic.List<CommandInfo> cmdList)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                conn.Open();
                using (SqlTransaction trans = conn.BeginTransaction())
                {
                    SqlCommand cmd = new SqlCommand();
                    try
                    {
                        int count = 0;
                        //循环
                        foreach (CommandInfo myDE in cmdList)
                        {
                            string cmdText = myDE.CommandText;
                            SqlParameter[] cmdParms = (SqlParameter[])myDE.Parameters;
                            PrepareCommand(cmd, conn, trans, cmdText, cmdParms);

                            if (myDE.EffentNextType == EffentNextType.WhenHaveContine || myDE.EffentNextType == EffentNextType.WhenNoHaveContine)
                            {
                                if (myDE.CommandText.ToLower().IndexOf("count(") == -1)
                                {
                                    trans.Rollback();
                                    return 0;
                                }

                                object obj = cmd.ExecuteScalar();
                                bool isHave = false;
                                if (obj == null && obj == DBNull.Value)
                                {
                                    isHave = false;
                                }
                                isHave = Convert.ToInt32(obj) > 0;

                                if (myDE.EffentNextType == EffentNextType.WhenHaveContine && !isHave)
                                {
                                    trans.Rollback();
                                    return 0;
                                }
                                if (myDE.EffentNextType == EffentNextType.WhenNoHaveContine && isHave)
                                {
                                    trans.Rollback();
                                    return 0;
                                }
                                continue;
                            }
                            int val = cmd.ExecuteNonQuery();
                            count += val;
                            if (myDE.EffentNextType == EffentNextType.ExcuteEffectRows && val == 0)
                            {
                                trans.Rollback();
                                return 0;
                            }
                            cmd.Parameters.Clear();
                        }
                        trans.Commit();

                        trans.Dispose();
                        cmd.Dispose();
                        conn.Close();
                        return count;
                    }
                    catch
                    {
                        trans.Rollback();
                        trans.Dispose();
                        cmd.Dispose();
                        conn.Close();
                        throw;
                    }
                    finally
                    {
                        trans.Dispose();
                        cmd.Dispose();
                        conn.Close();
                    }
                }
            }
        }
        /// <summary>
        /// 执行多条SQL语句，实现数据库事务。
        /// </summary>
        /// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的SqlParameter[]）</param>
        //public static void ExecuteSqlTranWithIndentity(Hashtable SQLStringList)
        //{
        //    using (SqlConnection conn = new SqlConnection(connectionString))
        //    {
        //        conn.Open();
        //        using (SqlTransaction trans = conn.BeginTransaction())
        //        {
        //            SqlCommand cmd = new SqlCommand();
        //            try
        //            {
        //                int indentity = 0;
        //                //循环
        //                foreach (DictionaryEntry myDE in SQLStringList)
        //                {
        //                    string cmdText = myDE.Key.ToString();
        //                    SqlParameter[] cmdParms = (SqlParameter[])myDE.Value;
        //                    foreach (SqlParameter q in cmdParms)
        //                    {
        //                        if (q.Direction == ParameterDirection.InputOutput)
        //                        {
        //                            q.Value = indentity;
        //                        }
        //                    }
        //                    PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
        //                    int val = cmd.ExecuteNonQuery();
        //                    foreach (SqlParameter q in cmdParms)
        //                    {
        //                        if (q.Direction == ParameterDirection.Output)
        //                        {
        //                            indentity = Convert.ToInt32(q.Value);
        //                        }
        //                    }
        //                    cmd.Parameters.Clear();
        //                }
        //                trans.Commit();
        //            }
        //            catch
        //            {
        //                trans.Rollback();
        //                throw;
        //            }
        //        }
        //    }
        //}
        /// <summary>
        /// 执行一条计算查询结果语句，返回查询结果（object）。
        /// </summary>
        /// <param name="SQLString">计算查询结果语句</param>
        /// <returns>查询结果（object）</returns>
        public static object GetSingle(string SQLString, params SqlParameter[] cmdParms)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand())
                {
                    try
                    {
                        PrepareCommand(cmd, connection, null, SQLString, cmdParms);
                        object obj = cmd.ExecuteScalar();
                        cmd.Parameters.Clear();
                        if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
                        {
                            cmd.Dispose();
                            connection.Close();
                            return null;
                        }
                        else
                        {
                            cmd.Dispose();
                            connection.Close();
                            return obj;
                        }
                    }
                    catch (System.Data.SqlClient.SqlException e)
                    {
                        cmd.Dispose();
                        connection.Close();
                        throw e;
                    }
                    finally
                    {
                        cmd.Dispose();
                        connection.Close();
                    }
                }
            }
        }

        /// <summary>
        /// 执行查询语句，返回SqlDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
        /// </summary>
        /// <param name="strSQL">查询语句</param>
        /// <returns>SqlDataReader</returns>
        //public static SqlDataReader ExecuteReader(string SQLString, params SqlParameter[] cmdParms)
        //{
        //    SqlConnection connection = new SqlConnection(connectionString);
        //    SqlCommand cmd = new SqlCommand();
        //    try
        //    {
        //        PrepareCommand(cmd, connection, null, SQLString, cmdParms);
        //        SqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
        //        cmd.Parameters.Clear();
        //        return myReader;
        //    }
        //    catch (System.Data.SqlClient.SqlException e)
        //    {
        //        throw e;
        //    }
        //    //			finally
        //    //			{
        //    //				cmd.Dispose();
        //    //				connection.Close();
        //    //			}	

        //}

        /// <summary>
        /// 执行查询语句，返回DataSet
        /// </summary>
        /// <param name="SQLString">查询语句</param>
        /// <returns>DataSet</returns>
        public static DataSet Query(string SQLString, params SqlParameter[] cmdParms)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                SqlCommand cmd = new SqlCommand();
                PrepareCommand(cmd, connection, null, SQLString, cmdParms);
                using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                {
                    DataSet ds = new DataSet();
                    try
                    {
                        da.Fill(ds, "ds");
                        cmd.Parameters.Clear();
                        cmd.Dispose();
                        connection.Close();
                    }
                    catch (System.Data.SqlClient.SqlException ex)
                    {
                        cmd.Dispose();
                        connection.Close();
                        throw new Exception(ex.Message);
                    }
                    finally
                    {
                        cmd.Dispose();
                        connection.Close();
                    }
                    return ds;
                }
            }
        }


        private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, string cmdText, SqlParameter[] cmdParms)
        {
            if (conn.State != ConnectionState.Open)
                conn.Open();
            cmd.Connection = conn;
            cmd.CommandText = cmdText;
            if (trans != null)
                cmd.Transaction = trans;
            cmd.CommandType = CommandType.Text;//cmdType;
            if (cmdParms != null)
            {
                foreach (SqlParameter parameter in cmdParms)
                {
                    if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
                        (parameter.Value == null))
                    {
                        parameter.Value = DBNull.Value;
                    }
                    cmd.Parameters.Add(parameter);
                }
            }
        }

        #endregion

        #region 存储过程操作 暂无用

        ///// <summary>
        ///// 执行存储过程，返回SqlDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
        ///// </summary>
        ///// <param name="storedProcName">存储过程名</param>
        ///// <param name="parameters">存储过程参数</param>
        ///// <returns>SqlDataReader</returns>
        //public static SqlDataReader RunProcedure(string storedProcName, IDataParameter[] parameters)
        //{
        //    SqlConnection connection = new SqlConnection(connectionString);
        //    try
        //    {
        //        SqlDataReader returnReader;
        //        connection.Open();
        //        SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
        //        command.CommandType = CommandType.StoredProcedure;
        //        returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);

        //        command.Dispose();
        //        return returnReader;
        //    }
        //    catch { }
        //    finally
        //    {
        //        connection.Close();
        //    }
        //    return null;
        //}


        ///// <summary>
        ///// 执行存储过程
        ///// </summary>
        ///// <param name="storedProcName">存储过程名</param>
        ///// <param name="parameters">存储过程参数</param>
        ///// <param name="tableName">DataSet结果中的表名</param>
        ///// <returns>DataSet</returns>
        //public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName)
        //{
        //    using (SqlConnection connection = new SqlConnection(connectionString))
        //    {
        //        DataSet dataSet = new DataSet();
        //        connection.Open();
        //        SqlDataAdapter sqlDA = new SqlDataAdapter();
        //        sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
        //        sqlDA.Fill(dataSet, tableName);
        //        connection.Close();
        //        return dataSet;
        //    }
        //}
        //public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName, int Times)
        //{
        //    using (SqlConnection connection = new SqlConnection(connectionString))
        //    {
        //        DataSet dataSet = new DataSet();
        //        connection.Open();
        //        SqlDataAdapter sqlDA = new SqlDataAdapter();
        //        sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
        //        sqlDA.SelectCommand.CommandTimeout = Times;
        //        sqlDA.Fill(dataSet, tableName);
        //        connection.Close();
        //        return dataSet;
        //    }
        //}


        ///// <summary>
        ///// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
        ///// </summary>
        ///// <param name="connection">数据库连接</param>
        ///// <param name="storedProcName">存储过程名</param>
        ///// <param name="parameters">存储过程参数</param>
        ///// <returns>SqlCommand</returns>
        //private static SqlCommand BuildQueryCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
        //{
        //    SqlCommand command = new SqlCommand(storedProcName, connection);
        //    command.CommandType = CommandType.StoredProcedure;
        //    foreach (SqlParameter parameter in parameters)
        //    {
        //        if (parameter != null)
        //        {
        //            // 检查未分配值的输出参数,将其分配以DBNull.Value.
        //            if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
        //                (parameter.Value == null))
        //            {
        //                parameter.Value = DBNull.Value;
        //            }
        //            command.Parameters.Add(parameter);
        //        }
        //    }

        //    return command;
        //}

        ///// <summary>
        ///// 执行存储过程，返回影响的行数		
        ///// </summary>
        ///// <param name="storedProcName">存储过程名</param>
        ///// <param name="parameters">存储过程参数</param>
        ///// <param name="rowsAffected">影响的行数</param>
        ///// <returns></returns>
        //public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
        //{
        //    using (SqlConnection connection = new SqlConnection(connectionString))
        //    {
        //        int result;
        //        connection.Open();
        //        SqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
        //        rowsAffected = command.ExecuteNonQuery();
        //        result = (int)command.Parameters["ReturnValue"].Value;
        //        //Connection.Close();
        //        return result;
        //    }
        //}

        ///// <summary>
        ///// 创建 SqlCommand 对象实例(用来返回一个整数值)	
        ///// </summary>
        ///// <param name="storedProcName">存储过程名</param>
        ///// <param name="parameters">存储过程参数</param>
        ///// <returns>SqlCommand 对象实例</returns>
        //private static SqlCommand BuildIntCommand(SqlConnection connection, string storedProcName, IDataParameter[] parameters)
        //{
        //    SqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
        //    command.Parameters.Add(new SqlParameter("ReturnValue",
        //        SqlDbType.Int, 4, ParameterDirection.ReturnValue,
        //        false, 0, 0, string.Empty, DataRowVersion.Default, null));
        //    return command;
        //}
        #endregion

        #region
        /// <summary>
        /// 分页
        /// </summary>
        /// <returns></returns>
        public static XQ.Model.Pager.Pager GetPage(XQ.Model.Pager.Pager pModel)
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                using (SqlCommand cmd = new SqlCommand("Com_Pagination", connection))
                {
                    try
                    {
                        cmd.CommandType = CommandType.StoredProcedure;
                        pModel.strCondition = " 1=1 " + pModel.strCondition;

                        if (pModel.sort == 1)
                        {
                            pModel.fldSort += " desc ";
                        }
                        cmd.Parameters.Add("@TotalCount", SqlDbType.Int, 4);
                        cmd.Parameters.Add("@TotalPage", SqlDbType.Int, 4);

                        cmd.Parameters.Add("@Table", SqlDbType.NVarChar, 1000);
                        cmd.Parameters.Add("@Column", SqlDbType.NVarChar, 1000);
                        cmd.Parameters.Add("@OrderColumn", SqlDbType.NVarChar, 100);
                        cmd.Parameters.Add("@GroupColumn", SqlDbType.NVarChar, 150);
                        cmd.Parameters.Add("@pageSize", SqlDbType.Int, 4);
                        cmd.Parameters.Add("@CurrentPage", SqlDbType.Int, 4);
                        cmd.Parameters.Add("@Group", SqlDbType.TinyInt, 1);
                        cmd.Parameters.Add("@Condition", SqlDbType.NVarChar, 4000);


                        cmd.Parameters["@TotalCount"].Direction = ParameterDirection.Output;
                        cmd.Parameters["@TotalPage"].Direction = ParameterDirection.Output;
                        cmd.Parameters["@Table"].Value = pModel.tableName;
                        cmd.Parameters["@Column"].Value = pModel.fldName;
                        cmd.Parameters["@OrderColumn"].Value = pModel.fldSort;
                        if (string.IsNullOrEmpty(pModel.GroupColumn))
                        {
                            cmd.Parameters["@GroupColumn"].Value = "";
                        }
                        else
                        {
                            cmd.Parameters["@GroupColumn"].Value = pModel.GroupColumn;
                        }
                        cmd.Parameters["@pageSize"].Value = pModel.pageSize;
                        cmd.Parameters["@CurrentPage"].Value = pModel.page;
                        if (pModel.Group == 0)
                            cmd.Parameters["@Group"].Value = 0;
                        else
                        {
                            cmd.Parameters["@Group"].Value = 1;
                        }
                        cmd.Parameters["@Condition"].Value = pModel.strCondition;


                        SqlDataAdapter dp = new SqlDataAdapter(cmd);
                        DataSet ds = new DataSet();

                        // 填充dataset
                        dp.Fill(ds);

                        //显示结果集
                        pModel.dt = ds.Tables[0];

                        pModel.pageCount = Int32.Parse(cmd.Parameters["@TotalPage"].Value.ToString());
                        pModel.counts = Int32.Parse(cmd.Parameters["@TotalCount"].Value.ToString());


                        ds.Dispose();
                        dp.Dispose();
                        cmd.Dispose();
                        connection.Close();
                        connection.Dispose();
                    }
                    catch
                    {
                        cmd.Dispose();
                        connection.Close();
                        connection.Dispose();
                    }
                    finally
                    {
                        cmd.Dispose();
                        connection.Close();
                        connection.Dispose();
                    }
                }
            }

            return pModel;
        }

        #endregion


        // 大批量导入数据
        public static bool BulkCopy(string tableName, DataTable data, int batchSize = 5000, int timeout = 300)
        {
            // SqlServer 批量插入
            using (var conn = new SqlConnection(connectionString))
            {
                using (var bulkCopy = new SqlBulkCopy(conn))
                {
                    bulkCopy.DestinationTableName = tableName;  // 表名
                    bulkCopy.BulkCopyTimeout = timeout;  // 超时
                    bulkCopy.BatchSize = batchSize;  // 单批次中的行数
                    //bulkCopy.ColumnMappings.Add("field1", "field3");

                    conn.Open();
                    if (data != null && data.Rows.Count != 0)
                    {
                        bulkCopy.WriteToServer(data);
                    }
                }
            }

            return true;
        }

    }
}
